3695789
Valve Stem Seal
Cummins®

The Valve Stem Seal 3695789, manufactured by Cummins, is a component designed to ensure the efficient operation of commercial truck engines. This seal plays a role in maintaining the integrity of the engine’s valve system by preventing oil leakage into the combustion chamber. Cummins, a renowned name in diesel engine manufacturing, produces this seal with a focus on durability and performance.

Basic Concepts of Valve Stem Seals

A Valve Stem Seal is a component that fits around the valve stem in an engine. Its function is to create a barrier that prevents oil from the valve train lubrication system from entering the combustion chamber. This seal operates by maintaining a tight fit around the valve stem, which moves up and down during engine operation. The importance of seals in an engine lies in their ability to maintain engine efficiency and performance by ensuring that oil does not contaminate the combustion process, which could lead to decreased engine power and increased emissions ¹.

Role of the Valve Stem Seal 3695789 in Truck Operation

The Valve Stem Seal 3695789 contributes to the functioning of a truck engine by ensuring that the valve stem remains properly lubricated while preventing oil from entering the combustion chamber. Positioned around the valve stem, this seal allows for smooth operation of the valve while maintaining a seal against oil leakage. Should the seal malfunction, it could result in oil entering the combustion chamber, leading to increased oil consumption, potential engine misfires, and decreased overall engine performance ².

Key Features of the Valve Stem Seal 3695789

The Valve Stem Seal 3695789 is characterized by its specific design and material composition, which enhance its performance and durability. Crafted from high-quality materials, this seal is designed to withstand the high temperatures and pressures within a commercial truck engine. Its design ensures a snug fit around the valve stem, providing effective sealing against oil leakage. These features contribute to the seal’s ability to maintain engine efficiency over extended periods of operation ³.

Benefits of Using the Valve Stem Seal 3695789

Utilizing the Valve Stem Seal 3695789 offers several advantages, including improved engine efficiency through reduced oil leakage, decreased oil consumption, and enhanced longevity of engine components due to minimized oil contamination in the combustion process. These benefits contribute to the overall performance and reliability of the engine, making the seal a valuable component in the maintenance and operation of commercial trucks.

Troubleshooting and Maintenance

Identifying common issues related to Valve Stem Seals, such as oil leaks or engine misfires, is important for maintaining engine performance. Regular maintenance practices, including periodic inspection and replacement of seals as needed, can ensure the longevity and optimal performance of the Valve Stem Seal 3695789. Attention to these details helps in preventing more significant engine issues and ensures the seal continues to perform its intended function effectively.

About Cummins

Cummins Inc. is a leader in the diesel engine manufacturing industry, with a history of innovation and commitment to quality. The company’s expertise in engine technology and components, including the Valve Stem Seal 3695789, underscores its dedication to providing reliable and high-performance solutions for the automotive industry. Cummins’ focus on quality and innovation has established it as a trusted name in the production of diesel engines and related components.

Valve Stem Seal Fitment for Cummins Engines

The Valve Stem Seal part number 3695789, manufactured by Cummins, is designed to fit a variety of engine models. This seal is crucial for maintaining engine efficiency and preventing oil leaks around the valve stems. Below is a detailed description of its compatibility with the listed engines:

ISG11 CM2880 G108 and ISG12 CM2880 G107

These engines, both part of the ISG series, are equipped with the CM2880 designation. The Valve Stem Seal 3695789 fits seamlessly with these engines, ensuring a tight seal around the valve stems to prevent oil from leaking into the combustion chamber.

ISG12 G CMOH6.0 G111

The ISG12 G CMOH6.0 G111 engine is another variant within the ISG series. The Valve Stem Seal 3695789 is compatible with this engine, providing a reliable seal that helps maintain optimal engine performance.

QSG12 CM2880 G112 and QSG12/X12 CM2350 G110

The QSG12 CM2880 G112 and QSG12/X12 CM2350 G110 engines both benefit from the Valve Stem Seal 3695789. This seal is engineered to fit these engines, ensuring that oil does not escape from the valve area, which is critical for engine longevity and efficiency.

X11 CM2670 X126B and X12 CM2350 X119B

The X11 CM2670 X126B and X12 CM2350 X119B engines are part of the X series. The Valve Stem Seal 3695789 is designed to fit these engines, providing a robust seal that helps in preventing oil leakage and maintaining the engine’s operational integrity.

X12 CM2670 X121B and X12N CMMDG1 X143B

These engines, X12 CM2670 X121B and X12N CMMDG1 X143B, are also compatible with the Valve Stem Seal 3695789. This seal ensures that the valve stems are properly sealed, which is essential for preventing oil contamination and maintaining engine efficiency.

X13 CM2670 X122B and Z14 CM2670 Z103B

The X13 CM2670 X122B and Z14 CM2670 Z103B engines are equipped with the Valve Stem Seal 3695789. This seal is designed to fit these engines, providing a reliable barrier against oil leakage and ensuring that the engine operates smoothly and efficiently.

Role of Part 3695789 Valve Stem Seal in Engine Systems

The Valve Stem Seal, identified as part 3695789, is integral to the efficient operation of various engine components. It is positioned around the valve stem within the cylinder head, where it plays a significant role in maintaining the integrity of the engine’s performance.

Interaction with the Cylinder Head

In the cylinder head, the Valve Stem Seal ensures that there is no unwanted leakage of combustion gases or oil into the valve guide. This containment is essential for preserving the compression within the combustion chamber, which directly influences the engine’s power output and efficiency.

Coordination with the Exhaust Valve Kit

When paired with the Exhaust Valve Kit, the Valve Stem Seal contributes to the smooth operation of the valve train. It helps in maintaining a consistent seal, which is vital for the proper functioning of the exhaust process. This ensures that exhaust gases are effectively expelled from the combustion chamber without any backflow into the intake system.

Support for the Camshaft and Rocker Lever

The Valve Stem Seal also supports the camshaft and rocker lever mechanisms. By providing a reliable seal around the valve stem, it assists in maintaining the precision of valve timing. This is particularly important for engines that require high levels of performance and accuracy in valve operation.

Integration with the Upper Engine Gasket Kit

In conjunction with the Upper Engine Gasket Kit, the Valve Stem Seal plays a part in the overall sealing strategy of the engine. It complements the gaskets by ensuring that the valve train components are well-sealed, contributing to the engine’s overall sealing effectiveness and durability.

Influence on the Connecting Rod and Piston

Although indirectly, the Valve Stem Seal affects the connecting rod and piston assembly. By ensuring efficient valve operation and sealing, it contributes to consistent combustion events. This consistency is vital for the smooth operation of the connecting rod and piston, as it ensures uniform force application during each combustion cycle.

Contribution to Injector Performance

The seal provided by part 3695789 also indirectly supports injector performance. A well-sealed valve train ensures that the air-fuel mixture is correctly managed within the combustion chamber. This precision is essential for the injector to deliver the optimal amount of fuel, leading to efficient combustion and reduced emissions.

Enhancement of Performance Parts

For engines equipped with performance parts, the Valve Stem Seal is even more significant. It ensures that the enhanced components, such as high-performance camshafts or upgraded valve springs, operate within their designed parameters. This results in improved engine responsiveness and power output.

Conclusion

In summary, the Valve Stem Seal (part 3695789) is a fundamental component that interacts with various engine systems to ensure optimal performance, efficiency, and durability. Its role in maintaining seals and preventing leaks is essential for the harmonious operation of the engine’s intricate components.